(19)

(11)

EP 3 676 597 A1

(12)

(43) Date of publication: 08.07.2020 Bulletin 2020/28 (21) Application number: 18792535.9 (22) Date of filing: 09.10.2018

(51) International Patent Classification (IPC):  G01N 21/3504(2014.01) G01N 21/17(2006.01) G01M 3/38(2006.01) (86) International application number: PCT/IB2018/057808 (87) International publication number: WO 2019/073377 (18.04.2019 Gazette 2019/16)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 09.10.2017 GB 201716534 (71) Applicant: CSIR 0184 Johannesburg (ZA)	(72) Inventor: COX, Ettienne 0081 Johannesburg (ZA) (74) Representative: HGF  1 City Walk Leeds LS11 9DX Leeds LS11 9DX (GB)